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  2. List of purification methods in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_purification...

    The process thus in its essence is similar to distillation, however the material which is condensed on the cooler surface then has to be removed mechanically, thus requiring different laboratory equipment. Bioleaching is the extraction of metals from their ores through the use of living organisms. Separation process. From Crystallization

  3. Filtration - Wikipedia

    en.wikipedia.org/wiki/Filtration

    The simplest method to achieve this is by gravity which can be seen in the coffeemaker example. In the laboratory, pressure in the form of compressed air on the feed side (or vacuum on the filtrate side) may be applied to make the filtration process faster, though this may lead to clogging or the passage of fine particles.

  4. Nanofiltration - Wikipedia

    en.wikipedia.org/wiki/Nanofiltration

    Nanofiltration is a membrane filtration process that uses nanometer sized pores through which particles smaller than about 1–10 nanometers pass through the membrane. Nanofiltration membranes have pore sizes of about 1–10 nanometers, smaller than those used in microfiltration and ultrafiltration , but a slightly bigger than those in reverse ...

  5. Membrane technology - Wikipedia

    en.wikipedia.org/wiki/Membrane_technology

    In dead-end filtration, the direction of the fluid flow is normal to the membrane surface. Both flow geometries offer some advantages and disadvantages. Generally, dead-end filtration is used for feasibility studies on a laboratory scale. The dead-end membranes are relatively easy to fabricate which reduces the cost of the separation process.

  6. Gravity filtration - Wikipedia

    en.wikipedia.org/wiki/Gravity_filtration

    The process of removing suspended matter contains two steps: transport and attachment. [2] This mode occurs when particles move to another place through the filter paper. Gravity filtration is an easy way to remove solid impurities or the precipitation from an organic liquid. The impurity is trapped in the filter.

  7. Microfiltration - Wikipedia

    en.wikipedia.org/wiki/Microfiltration

    Although environmental impacts of membrane filtration processes differ according to the application, a generic method of evaluation is the life-cycle assessment (LCA), a tool for the analysis of the environmental burden of membrane filtration processes at all stages and accounts for all types of impacts upon the environment including emission ...

  8. Trump aims to deport all immigrants in the US illegally - AOL

    www.aol.com/news/trump-says-aims-deport...

    By Ted Hesson. WASHINGTON (Reuters) -U.S. President-elect Donald Trump aims to deport all immigrants in the U.S. illegally over his four-year term but wants a deal to protect so-called "Dreamer ...

  9. Diatomaceous earth filtration - Wikipedia

    en.wikipedia.org/wiki/Diatomaceous_earth_filtration

    Diatomaceous earth filtration is a special filtration process that removes particles from liquids as it passes through a layer of fossilized remains of microscopic water organism called diatoms. These diatoms are mined from diatomite deposits which are located along the Earth's surface as they have accumulated in sediment of open and moving ...